When there are chances of sparking dusts catching fire or creating explosion, usually wet type of scrubbing collectors are employed. Water is mainly used for quenching or scrubbing the particles.This is a compact device compared to dry type fabric dust collectors, however there are problems of corrosion & secondary water pollution.
The design of the Techflow Venturi Scrubber consists of a "Wet Approach" venturifollowed by a liquid entrainment separator. Dust laden gases enter the venturi and instantly make contact with the tangentially introduced scrubbing liquid swirling down the venturi's converging walls. At the venture throat, the gas and liquid streams collide and the liquid breaks down into droplets which trap dust particles.
This gas/liquid mixture passes through a flooded elbow, and then enters the entrainment separator through a tangential inlet.
Centrifugal action removes the heavy wetted particles from the gas stream.
As an alternate, when very large diameter separators are required, the liquid is separated by passing the stream through a mist eliminator baffle.
The dust/liquid mixture is discharged from the separator bottom drain and the cleaned gas leaves through the top of the separator.
Cross Flow Scrubber
In this variant of water scrubber, air with extracted dust travel in a horizontal chamber, where submerged baffle plates are designed to wet dust. After wetting, dust settles down in bottom hopper, where air travels up & out thro’ terminal filters. An ID exhauster is kept at the final outlet.
Packed Bed Scrubber
The Techflow Vertical Packed Bed Scrubber is custom designed for each application to provide high efficiency, low cost gas cleaning. The packing media is uniquely shaped to provide abundant surface area to provide intimate contact between the gas and scrubbing liquid.
The resultant effect is high scrubbing efficiency, allowing optimum packing section length with a compact design and low pressure drop. Several configurations and options are offered for the Techflow Vertical Packed Bed Air/Gas Scrubber.
Low Energy Scrubber
Techflow’s Low Energy Scrubber cleans the air by the combined action of centrifugal force and a thorough intermixing of water and dustladen air.
The dust is separated from the air by a water curtain, created by the flow of air through a partially submerged stationary impeller. Air flowing through the impeller at a high velocity conveys a turbulent sheet of water with it. The centrifugal force exerted by rapid changes in direction of flow causes the dust particles to penetrate the water film and become permanently trapped.
Entrained water droplets in the cleaned air are removed by specially designed, wide-space chevron eliminators for smaller collectors or three curved de entrainment baffles for larger collectors. The water in the reservoir is continually used. Since the water curtain is produced by the airflow, no pumps or nozzles are required.